A man accidentally brought his loaded .40 caliber gun onto an airplane. He didn't know he had it. Neither did the TSA, who completely missed it during its scan and allowed that plane to fly. Apparently, this happens a lot.

Our favorite masters of weaponization at Defense Review deliver us this video, which shows what Hammer's H2X-40 shotgun/turret system can do whan faced with an adversary — in this case, what look to be several purchases from the home and garden section of Wal-Mart. It's operated from the inside of the SUV, so…